On Mon, Jan 29, 2018 at 07:00:02AM -0500, Pete Geenhuizen wrote: > > > On 01/28/18 20:15, Fred Smith wrote: > >On Sun, Jan 28, 2018 at 12:10:29PM -0500, Pete Geenhuizen wrote: > >>I'm upgrading from CentOS6 to CentOS 7. > >> > >>I run 2 weather stations on C6 and have one of them attached to > >>ttyS0 which is on the motherboard, and the other to ttyS2 which in > >>on an add-on PCI serial card. > >> > >>I'm migrating the weather stations another host running C7 which has > >>a similar hardware configuration. When I connect the weather > >>station to ttyS0 everything works fine, but when I try to use ttyS1 > >>or ttyS2 nothing happens. > >> > >>The OS identifies all 3 ports, and I've already tried several > >>different serial cards several of the slots on the motherboard all > >>have yielded the same result. I've even gone so far as to try to > >>get this to work on another computer running C7 with the same > >>result, success on ttyS0, but nothing nothing when I try ttyS1 or > >>ttyS2. > >> > >>I'm thinking that this might be a driver issue, but having used > >>several different cards I'm just not sure. > >> > >>Any assistance would be greatly appreciated. > >> > >>Pete > >Wondering if you've tried poking at them with 'setserial'? > > > Thanks for the suggestion. > > I looked at them with setserial, but I have no familiarity with the > program to know what to change. > > setserial -ag /dev/ttyS* > /dev/ttyS0, Line 0, UART: 16550A, Port: 0x03f8, IRQ: 4 > Baud_base: 115200, close_delay: 50, divisor: 0 > closing_wait: 3000 > Flags: spd_normal skip_test > > /dev/ttyS1, Line 1, UART: 16550A, Port: 0x8000, IRQ: 17 > Baud_base: 115200, close_delay: 50, divisor: 0 > closing_wait: none > Flags: spd_normal skip_test > > /dev/ttyS2, Line 2, UART: 16550A, Port: 0x8400, IRQ: 17 > Baud_base: 115200, close_delay: 50, divisor: 0 > closing_wait: none > Flags: spd_normal skip_test > > /dev/ttyS3, Line 3, UART: unknown, Port: 0x02e8, IRQ: 3 > Baud_base: 115200, close_delay: 50, divisor: 0 > closing_wait: 3000 > Flags: spd_normal > > I changed the closing_wait: on ttyS1 to match ttyS0, but that didn't > do anything, so there must be more to it. > > Pete it has been so many years since I've fooled with a serial port that I don't remember any details. however, this page may prove helpful, it appears to contain a lot of potentially useful info: http://www.tldp.org/HOWTO/Serial-HOWTO-8.html and also this one (linked from the document above: http://www.tldp.org/HOWTO/Serial-HOWTO-16.html#slow_ Fred -- ---- Fred Smith -- fredex at fcshome.stoneham.ma.us ----------------------------- "For him who is able to keep you from falling and to present you before his glorious presence without fault and with great joy--to the only God our Savior be glory, majesty, power and authority, through Jesus Christ our Lord, before all ages, now and forevermore! Amen." ----------------------------- Jude 1:24,25 (niv) -----------------------------